/ Dictionary / Index A ACDA: Meaning and Definition of Find definitions for: ACDA Pronunciation: [key] (United States) Arms Control and Disarmament Agency. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Accutane AC/DC Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language